Gunnar,
thank you for your suggestion, but the problem is that after powering up the keyboard is completely frozen, apparently because the OS is corrupted, so if I press the "Function" button nothing happens. I could load another version of the OS (like 1.03, that I already have), but I am afraid that I would loose a number of functions; I am still searching the web to find a site where I can download OS 2.0.
Thanks again,
Andrea
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.